[jboss-jira] [JBoss JIRA] Closed: (JBRULES-315) Support to Expression and Nested Accessors

[Edson Tirelli (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-315?page=all ]

Edson Tirelli closed JBRULES-315.
---------------------------------

    Resolution: Done

Support to expressions added. Example:

rule "eval rewrite"
	when
		$o : OrderItem( order.number == 10 )
	then
	    results.add( $o );
end

rule "eval rewrite2"
	when
		$o1 : OrderItem( order.number == 11, $seq : seq == 1 )
		$o2 : OrderItem( order.number == $o1.order.number, seq != $seq )
	then
		results.add( $o2 );
end

rule "eval rewrite3"
	when
		$o1 : OrderItem( order.number == 12, seq == 1 )
		$o : Order( items[1] == $o1 ) 
	then
		results.add( $o );
end 

rule "eval rewrite4"
	when
		OrderItem( $nbr : order.number == 13, seq == 1 )
		$o : Order( number == $nbr ) 
	then
		results.add( $o );
end

rule "map access"
	when
		$m : Map( this['name'] == "Edson", this.surname == "Tirelli", this['age'] == 28 )
	then
		results.add( $m );
end


> Support to Expression and Nested Accessors
> ------------------------------------------
>
>                 Key: JBRULES-315
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-315
>             Project: JBoss Rules
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>            Reporter: Michael Neale
>         Assigned To: Edson Tirelli
>            Priority: Minor
>             Fix For:  4.0.0.MR3
>
>
> Would be nice to have a feature like:
> Map(this.foo == bar)  as being accessed as: map.get("foo")
> This can work as in the ClassFieldInspector it can tell that there is no "getFoo" method, but there is a get(xxx) method - hence it can pass in the key as the field name (as a string).
> A limitation may be that we want to use a prev bound variable as a key, but I can't see how that will work short of adding new syntax (this currently stays within the current grammar which is good - and looking up fields via a String key is more then useful !).

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